An optimisation methodology for suspended inter-array power cable configurations between two floating offshore wind turbines

Ahmad, Izwan Bin; Schnepf, Anja; Ong, Muk Chen

doi:10.1016/j.oceaneng.2023.114406

Cited by 17 publications

(12 citation statements)

References 10 publications

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“…The non-linear mechanical properties of the cable are imported from UFLEX and given in tabularized format as an input to OrcaFlex. The cable's total length is 530 m, which is discretized into 530 elements with a uniform size of 1 m. The OC3 5MW spar-type FOWT model used in the present study was previously validated by Schnepf et al [48] and Ahmad et al [49]. An implicit solver is employed in the time-domain simulations with a fixed time step set to 0.05 s.…”

Section: Case Studymentioning

confidence: 99%

“…where v c, tide (0) is the tidal current velocity at the still water level, z is the distance from the still water level, d is the water depth to the still water level, and α is the exponent set to α = 1/7. The surface tidal current profile is set up according to Ahmad et al [49]. The surface tidal current speed is 0.2 m/s in all ECs, which is selected based on the NORSOK [54] standard.…”

Section: Environmental Conditionsmentioning

confidence: 99%

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Reference Power Cable Models for Floating Offshore Wind Applications

Janocha,

Ong,

Lee

et al. 2024

Sustainability

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The present study aims to address the knowledge gaps in dynamic power cable designs suitable for large floating wind turbines and to develop three baseline power cable designs. The study includes a detailed database of structural and mechanical properties for three reference cable models rated at 33 kV, 66 kV, and 132 kV to be readily used in global dynamic response simulations. Structural properties are obtained from finite element method (FEM) models of respective cable cross-sections built in UFLEX v2.8.9—a non-linear stress analysis program. Extensive mesh sensitivity studies are performed to ensure the accuracy of the predicted structural properties. The cable’s structural design is investigated using global response simulations of an OC3 5MW reference wind turbine coupled with the dynamic power cable in a lazy wave configuration. The feasibility of the present reference cable in floating offshore wind applications is assessed through a simplified analysis of cable fatigue life and structural integrity analysis of the cable in extreme environmental conditions. The analysis results suggest that the dynamic power cable does not significantly affect the response characteristics of the floating wind turbine in the analyzed lazy wave configuration. Furthermore, a simplified fatigue analysis demonstrates that the proposed cable design can sustain representative environmental loading scenarios and shows favorable dynamic performance in a lazy wave configuration.

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Section: Case Studymentioning

confidence: 99%

Section: Environmental Conditionsmentioning

confidence: 99%

Reference Power Cable Models for Floating Offshore Wind Applications

Janocha,

Ong,

Lee

et al. 2024

Sustainability

Self Cite

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“…Use cases of GA-based multi-objective optimizations have also been reviewed in applications such as the optimization of the layout [27,28], maintenance [29], and the use of dynamic cables [30] in OWFs, as well as the optimization of the power flow in multi-terminal offshore DC networks [31].…”

Section: Literature Reviewmentioning

confidence: 99%

Power-from-Shore Optioneering for Integration of Offshore Renewable Energy in Oil and Gas Production

Antunes,

Castro,

Santos

et al. 2023

Energies

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Despite the widespread usage of high-voltage alternating current (HVAC) for the connection of offshore wind farms (OWF), its use to power-from-shore (PFS) offshore oil and gas (O&G) production sites is often not feasible. Its limitations for long-distance subsea transmission are usually found at 50–70 km from shore and might be even shorter when compared commercially to a direct-current (DC) alternative or conventional generation. Therefore, this research paper aims to address the standardization of offshore transmission with a particular focus on the high-voltage direct current (HVDC) alternative. While the distance is typically not a limiting factor when using DC, and the voltages used are rather standard, the concept of power envelopes can be quite useful in addressing the high variability of offshore site power requirements and setting a design baseline that would lead to improved lead time. In this article, a full back and front-end genetic optioneering model purposely built from the ground up in Python language is used to #1 define up to three DC power envelopes that would cater to most of the candidate’s requirements and #2 provide the lowest cost variance. The results will demonstrate that this can be achieved at a minor overall cost expense.

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“…The study found that the double wave configuration exhibited superior performance, offering advantages in terms of reduced fatigue damage and better handling of high curvature tension. Ahmad et al (2023) explored an optimization methodology for suspended inter-array power cable configurations between two floating offshore wind turbines. Their research focused on the dynamic response of these configurations using a novel setup involving subsea buoys.…”

Section: Introductionmentioning

confidence: 99%

A Fundamental Study on Inter-Array Cabling Methods Between Two Floating Offshore Wind Turbines in Shallow Waters

Kim,

Shim,

Kim

et al. 2024

IMDC

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As the transition to renewable energy accelerates, interest in wind farms is heightening. There is a need to safely and economically transport energy produced from Floating Offshore Wind Turbines (FOWTs) to the shore. Consequently, this study conducted an analysis of inter-array cabling methods between two FOWTs in shallow waters, targeting the southwestern sea of South Korea. This research targeted four shapes of dynamic power cables: free hanging catenary, lazy wave shape, suspended and W-configuration type. To verify the economy of the dynamic power cable, the total lengths were compared, and to check safety, curvature and tension were examined. Insights obtained through this study indicate that among the four shapes of dynamic power cables, the lazy wave shape has substantial advantages in shallow waters.

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An optimisation methodology for suspended inter-array power cable configurations between two floating offshore wind turbines

Cited by 17 publications

References 10 publications

Reference Power Cable Models for Floating Offshore Wind Applications

Reference Power Cable Models for Floating Offshore Wind Applications

Power-from-Shore Optioneering for Integration of Offshore Renewable Energy in Oil and Gas Production

A Fundamental Study on Inter-Array Cabling Methods Between Two Floating Offshore Wind Turbines in Shallow Waters

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